CN113927966A - Mildew-proof water-resistant anti-seismic container bottom plate and preparation method thereof - Google Patents

Mildew-proof water-resistant anti-seismic container bottom plate and preparation method thereof Download PDF

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Publication number
CN113927966A
CN113927966A CN202010659830.0A CN202010659830A CN113927966A CN 113927966 A CN113927966 A CN 113927966A CN 202010659830 A CN202010659830 A CN 202010659830A CN 113927966 A CN113927966 A CN 113927966A
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China
Prior art keywords
mildew
resistant
proof
water
bamboo
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CN202010659830.0A
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Chinese (zh)
Inventor
邓健超
郑忠福
俞艳
吴黄贵
王戈
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Fujian Heqizu Forestry Technology Co ltd
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Fujian Heqizu Forestry Technology Co ltd
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Abstract

The invention provides a mildew-proof, water-resistant and earthquake-resistant container bottom plate and a preparation method thereof, and belongs to the technical field of composite materials. According to the invention, a plurality of layers of dried fibrous bamboo bundle single plates impregnated with the mildew preventive and the adhesive in sequence are selected, or a plurality of layers of fibrous bamboo bundle single plates with higher adhesive amount are selected, so that the defects of medicament waste, machine operation cost increase and the like caused by an integral pretreatment mode of impregnating the mildew preventive at high pressure can be overcome, the limitation that a post-treatment mode of painting a surface protective layer is influenced by the durability of a coating is broken, the mildew-proof and water-resistant performance of the board is enhanced, the bending modulus is improved to a certain extent, the traditional anti-seismic buffer functional units such as wood single plates, bamboo mats and the like are reserved, the anti-seismic buffer functional layer of the rubber sheet is additionally arranged, the respective performance advantages of wood, bamboo and rubber are fully exerted through a reasonable laminated structure design, the anti-seismic performance of the board is effectively enhanced, and the application safety of the board is improved.

Description

Mildew-proof water-resistant anti-seismic container bottom plate and preparation method thereof
Technical Field
The invention relates to the technical field of composite materials, in particular to a mildew-proof, water-resistant and earthquake-resistant container bottom plate and a preparation method thereof.
Background
With the demand of social development, the container is not only limited to the use of freight transportation, but also widely applied to the fields of special equipment boxes, storage boxes, temporary residences, offices, exhibition halls and the like. The main materials of the container bottom plate are wood and bamboo, which play a role in supporting and protecting people or objects in the container.
As a biomass material, wood and bamboo have high sensitivity to moisture, and corresponding products of the biomass material are easy to deform and crack under a high-humidity environment, so that the use performance is influenced. The glue absorption amount of the plate blank is increased within a certain range, which is beneficial to enhancing the internal bonding strength of the hot-pressed forming plate and improving the water resistance of the hot-pressed forming plate. In addition, bamboo and bamboo composite materials are also easy to mildew, however, the conventional mildew-proof treatment for bamboo composite materials comprises an integral pretreatment mode of high-pressure impregnation with a mildew-proof agent and a post-treatment mode of coating a surface protection layer. The former causes waste of chemicals and an increase in cost for running the machine, and the latter is limited in the antifungal effect by durability of the coating. Moreover, in the in-service use process, the container bottom plate inevitably suffers irregular extrusion and vibrations, thereby very easily leads to the condition such as sunken, layering, fracture to appear in the container bottom plate to reduce the mechanical properties of container bottom plate, influences the life of container bottom plate.
Disclosure of Invention
In view of the above, the invention aims to provide a mildew-proof, water-resistant and earthquake-resistant container bottom plate and a preparation method and application thereof. The container bottom plate provided by the invention effectively enhances the mildew-proof, water-resistant and earthquake-resistant performances of the container bottom plate through reasonable material selection and laminated structure design.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a mildew-proof, water-resistant and shock-resistant container bottom plate which sequentially comprises a mildew-proof and water-resistant functional layer, an interlayer a, a shock-resistant buffer functional layer, an interlayer b, an interlayer c and a core layer from a surface layer to the core layer, wherein the mildew-proof and water-resistant functional layer is a fibrous bamboo bundle veneer, the shock-resistant buffer functional layer is a rubber sheet, the interlayer a and the interlayer b are veneers, the interlayer c is a bamboo unit layer, and the core layer is a fibrous bamboo bundle veneer.
Preferably, the outermost layer of the bottom plate of the mildew-proof, water-resistant and earthquake-resistant container further comprises symmetrically arranged impregnated bond paper, and the impregnated bond paper is melamine resin impregnated paper or melamine resin impregnated paper toughened and modified by polyethylene glycol.
Preferably, the veneer comprises a wood veneer or a bamboo veneer, and the wood veneer is made of poplar, maple, pine or eucalyptus.
Preferably, the rubber sheet is made of chloropropane rubber, nitrile rubber or cork rubber.
Preferably, the bamboo unit layer is a bamboo mat, a bamboo curtain or a bamboo split net-shaped sheet.
Preferably, the bamboo mat is a thin bamboo strip unit with a weaving angle of 90 degrees.
Preferably, the bamboo skin net-shaped sheet is a bamboo skin unit with a weaving angle of 90 degrees or 60 degrees/120 degrees.
Preferably, the gluing amount of the mildew-proof and water-resistant functional layer is 15 wt.% to 30 wt.%.
Preferably, the mildew-proof water-resistant functional layer further contains a mildew preventive, the mildew preventive is a water-borne organic silicon quaternary ammonium salt mildew preventive or a silicon-aluminum sol fixed copper-boron compound mildew preventive, the drug-loading rate of the mildew-proof water-resistant functional layer is 10 wt.% to 12 wt.%, and the gluing amount of the mildew-proof water-resistant functional layer is 10 wt.% to 15 wt.%.
The invention also provides a preparation method of the mildew-proof, water-resistant and earthquake-resistant container soleplate, which comprises the following steps:
coating adhesives on the mildew-proof and water-resistant functional layer, the interlayer a, the anti-seismic buffer functional layer, the interlayer b, the interlayer c and the core layer, and symmetrically assembling according to the combination form of the mildew-proof and water-resistant functional layer, the interlayer a, the anti-seismic buffer functional layer, the interlayer b, the interlayer c and the core layer to obtain a plate blank;
and carrying out hot press molding on the plate blank to obtain the mildew-proof, water-proof and earthquake-proof container bottom plate.
The invention provides a mildew-proof, water-resistant and earthquake-resistant container bottom plate which sequentially comprises a mildew-proof and water-resistant functional layer, an interlayer a, an earthquake-resistant buffer functional layer, an interlayer b, an interlayer c and a core layer from a surface layer to the core layer, wherein the mildew-proof and water-resistant functional layer, the interlayer a, the earthquake-resistant buffer functional layer, the interlayer b and the interlayer c are symmetrically arranged, the earthquake-resistant buffer functional layer is a rubber sheet, the interlayer a and the interlayer b are veneers, the interlayer c is a bamboo unit layer, and the core layer is a fibrous bamboo bundle veneer. The container bottom plate provided by the invention effectively enhances the mildew-proof, water-resistant and earthquake-resistant performances of the container bottom plate through reasonable material selection and laminated structure design.
Further, compared with the prior art, the invention has the following advantages:
(1) the secondary outer layer of the container bottom plate provided by the invention is set as a mildew-proof and water-resistant functional layer, a plurality of dried layers of the fibrous bamboo bundle veneers impregnated with the mildew-proof agent and the adhesive are selected, or a plurality of layers of the fibrous bamboo bundle veneers with higher gluing amount (the gluing amount of the mildew-proof and water-resistant functional layer is 15-30 wt.%) are selected, the mildew-proof effect is improved by the higher gluing amount, the defects of medicament waste, machine operation and other cost increase caused by an integral pretreatment mode of impregnating the mildew-proof agent at high pressure can be overcome, the limitation that a post-treatment mode of coating a surface protective layer is influenced by the durability of a coating is broken, the mildew-proof and water-resistant performance of the plate is enhanced, and the bending modulus is improved to a certain extent;
(2) the container bottom plate provided by the invention not only reserves traditional anti-seismic buffer function units such as wood veneers, bamboo veneers and bamboo mats, but also additionally arranges a rubber sheet anti-seismic buffer function layer, fully exerts respective performance advantages of wood, bamboo and rubber through reasonable laminated structure design, effectively enhances the anti-seismic performance of the plate and improves the application safety of the plate;
(3) according to the preparation method of the container bottom plate, the glue absorption amount of the plurality of plate blank layers is increased (but excessive waste of glue solution is not caused), the internal bonding strength of the hot-press molding plate is enhanced to a certain extent, and the water resistance of the hot-press molding plate is improved; different from the conventional board made of hydrophilic fiber materials (wood and bamboo), the invention is additionally provided with a plurality of layers of non-water-absorbing materials (rubber sheets), which is also beneficial to reducing the overall water-absorbing thickness expansion or weight gain rate of the container bottom plate;
(4) according to the invention, the number of each layer of units and related processes are adjusted for hot press molding according to the requirements of the use environment of the container bottom plate, so that the thickness, functions and the like of the container bottom plate can be customized, and the container bottom plate has a better application prospect.
Drawings
Fig. 1 is a schematic structural view of the mouldproof, water-resistant and shock-resistant container bottom plate manufactured in examples 1 and 2, wherein the mouldproof, water-resistant and shock-resistant container bottom plate comprises (i) impregnated bond paper, (ii) a mouldproof and water-resistant functional layer, (iii) an interlayer a, (iv) a shock-resistant buffer functional layer, (iv) an interlayer b, (iv) an interlayer c, and (iv) a core layer.
Detailed Description
The invention provides a mildew-proof, water-resistant and earthquake-resistant container bottom plate which sequentially comprises a mildew-proof and water-resistant functional layer, an interlayer a, an earthquake-resistant buffer functional layer, an interlayer b, an interlayer c and a core layer from a surface layer to the core layer, wherein the mildew-proof and water-resistant functional layer, the interlayer a, the earthquake-resistant buffer functional layer, the interlayer b and the interlayer c are symmetrically arranged, the earthquake-resistant buffer functional layer is a rubber sheet, the interlayer a and the interlayer b are veneers, the interlayer c is a bamboo unit layer, and the core layer is a fibrous bamboo bundle veneer.
In the invention, the outermost layer of the mildew-proof, water-resistant and earthquake-resistant container bottom plate preferably further comprises symmetrically arranged impregnated bond paper, and the impregnated bond paper is preferably melamine resin impregnated paper or melamine resin impregnated paper toughened and modified by polyethylene glycol. In the invention, the thickness of the impregnated bond paper is preferably 0.15-0.30 mm, more preferably 0.20mm, and the gum dipping amount is preferably 120-160 wt.%, more preferably 130-150 wt.%, and most preferably 140 wt.%. In the invention, the impregnated bond paper is preferably obtained by impregnating base paper of the impregnated bond paper, and the density of the base paper of the impregnated bond paper is preferably 65-75 g/m2More preferably 70g/m2. The specific mode of the polyethylene glycol toughening modified melamine resin is not particularly limited in the invention, and the mode known by the person skilled in the art can be adopted.
In the present invention, the number of layers of the bottom plate of the mildew-proof, water-resistant and earthquake-resistant container is preferably 13, and when the number of layers of the mildew-proof, water-resistant and earthquake-resistant functional layer, the impregnated bond paper, the interlayer a, the interlayer b, the interlayer c and the core layer are changed, the number of layers of the bottom plate of the mildew-proof, water-resistant and earthquake-resistant container is also changed, specifically, 11, 15 or 22 layers may be used.
In the invention, the glue coating amount of the mildew-proof and water-resistant functional layer is preferably 15 wt.% to 30 wt.%, more preferably 29 wt.%, and a higher glue coating amount can improve the mildew-proof effect.
In the invention, the mildew-proof water-resistant functional layer preferably further contains a mildew preventive, the mildew preventive is preferably a water-borne organic silicon quaternary ammonium salt mildew preventive or a silica-alumina sol immobilized copper-boron compound mildew preventive, the drug loading of the mildew-proof water-resistant functional layer is preferably 10-12 wt%, and the gluing amount of the mildew-proof water-resistant functional layer is preferably 10-15 wt%. The source of the antifungal agent in the present invention is not particularly limited, and commercially available products known to those skilled in the art may be used.
In the present invention, the fiberized bamboo bundle veneer is preferably prepared by a method comprising the following steps: selecting and using three-to-four-year-old moso bamboos, cutting round bamboos into bamboo tube sections with the length of 1-2 m, forming bamboo strips by hitting bamboo slices and removing bamboo joints, mechanically scraping off 1-3 mm bamboo green and bamboo yellow by using a steel brush, mechanically rolling by using 4-8 sets of symmetrical compression rollers to form a fibrous bamboo bundle, transversely weaving and integrating the bamboo bundle by using sewing equipment, drying to the water content of below 8%, forming a fibrous bamboo bundle single plate for standby use, more preferably mechanically scraping off 2mm bamboo green and bamboo yellow by using the steel brush, and mechanically rolling by using 6 sets of symmetrical compression rollers to form the fibrous bamboo bundle.
In the present invention, the mold-proof and water-resistant functional layer containing a mold preventive is preferably prepared by a method comprising the steps of: and (3) soaking the fiberized bamboo bundle veneer into the mildew preventive, drying, soaking the fiberized bamboo bundle veneer into the adhesive, and drying until the water content is below 8% for later use. In the invention, the concentration of the mildew preventive is 1.5-3.0 wt.%. In the invention, the impregnation mildew preventive and the impregnation adhesive are preferably pressure impregnation, the pressure impregnation time is preferably 30-90 min, and the impregnation pressure is preferably 0.05-0.15 MPa.
In the invention, the assembly textures of the fibrous bamboo bundle veneers in the mould-proof waterproof functional layer are preferably consistent, and the number of the fibrous bamboo bundle veneers in the mould-proof waterproof functional layer is preferably 2-4.
In the present invention, the adhesive is preferably a phenol resin or a modified phenol resin. The preparation of the mildew-proof and water-resistant functional layer with the gum dipping amount of 15-30 wt.% is preferably realized by dipping the resin with high solid content, prolonging the dipping time or by the modes of gum dipping-drying-gum dipping again-drying again. The source of the modified phenolic resin is not particularly limited in the present invention, and any kind known to those skilled in the art may be used.
In the invention, the core layer is the fiberized bamboo bundle veneer, the preparation method of the fiberized bamboo bundle veneer is not specially limited, and the core layer is prepared by adopting the technical scheme of the technical scheme.
In the present invention, the core layer is preferably sized at 10 wt.% to 20 wt.%, more preferably at 12 wt.% to 15 wt.%, and the core layer is preferably made of a phenolic resin or a modified phenolic resin, and the source of the modified phenolic resin is not particularly limited in the present invention, and may be any kind known to those skilled in the art.
In the invention, the assembly texture of the fiberized bamboo bundle veneers in the core layer is preferably consistent with the texture of the mildew-proof and water-resistant functional layer, and the number of layers of the fiberized bamboo bundle veneers in the core layer is preferably 2-4.
In the invention, the material of the rubber sheet is preferably chloropropane rubber, nitrile rubber or cork rubber.
In the invention, the thickness of the rubber sheet is preferably 1-4 mm, and more preferably 1-2 mm.
In the present invention, the number of layers of the rubber sheet is preferably 1.
In the invention, the glue coating amount of the rubber sheet is preferably 80-100 g/m of single surface2More preferably 90 to 100g/m per side2. In the present invention, the adhesive used for the rubber sheet is preferably polyisocyanate.
In the invention, the adhesive coating amount of the interlayer a and the interlayer b is preferably 100-140 g/m of single surface independently2More preferably 120 to 130g/m per side2Most preferably 125g/m on one side2. In the present invention, the adhesive used for the interlayer a and the interlayer b is preferably a phenolic resin or a modified phenolic resin, and the source of the modified phenolic resin is not particularly limited in the present invention, and may be any of those known to those skilled in the art.
In the invention, the veneer preferably comprises a wood veneer or a bamboo veneer, and the material of the wood veneer preferably comprises poplar, maple, pine or eucalyptus.
The method preferably takes poplar, maple, pine or eucalyptus, and the poplar, the maple, the pine or the eucalyptus is subjected to rotary cutting to obtain the wood veneer, wherein the thickness of the wood veneer is preferably 1.0-1.5 mm.
In the invention, the thickness of the bamboo veneer is preferably 0.10-1.0 mm or 2-5 mm. According to the invention, the round bamboo is preferably rotary cut to obtain the bamboo veneer with the thickness of 0.10-1.0 mm or the bamboo veneer with the thickness of 2-5 mm is obtained by slicing the bamboo flat pressing plate, and the thickness of the bamboo veneer is preferably 0.10-0.6 mm.
In the invention, the bamboo unit layer is preferably a bamboo mat, a bamboo curtain or a bamboo split net-shaped sheet.
In the invention, the bamboo mat is preferably a thin bamboo strip unit with a weaving angle of 90 degrees.
In the invention, the bamboo skin net-shaped sheet is preferably a bamboo skin unit with a weaving angle of 90 degrees or 60 degrees/120 degrees.
The method preferably selects three to four-year-old moso bamboos, cuts round bamboos into bamboo tube sections with the length of 1.2-2.4 m, obtains radial or chordwise bamboo splits with the width of 10-30 mm, more preferably 20-25 mm by using a split machine, weaves the bamboo splits by 90 degrees in a warp and weft mode to obtain the bamboo mat, or weaves the bamboo splits transversely to obtain the bamboo curtain, or weaves the bamboo splits by 90 degrees or 60 degrees/120 degrees to obtain the bamboo split net-shaped sheet.
In the invention, the assembly texture of the single plates in the interlayer a and the interlayer b is preferably vertical to the texture of the mildew-proof and water-resistant functional layer, and the number of the interlayer a and the interlayer b is preferably 1-2 independently.
In the present invention, the interlayer c preferably comprises a 90 ° or 60 °/120 ° assembly structure, the interlayer c plays a bearing role, and the assembly structure comprising 90 ° or 60 °/120 ° has better bearing capacity than a straight grain assembly.
In the invention, the number of the bamboo unit layers in the interlayer c is preferably 2-4.
The invention also provides a preparation method of the mildew-proof, water-resistant and earthquake-resistant container soleplate, which comprises the following steps:
coating adhesives on the mildew-proof and water-resistant functional layer, the interlayer a, the anti-seismic buffer functional layer, the interlayer b, the interlayer c and the core layer, and symmetrically assembling according to the combination form of the mildew-proof and water-resistant functional layer, the interlayer a, the anti-seismic buffer functional layer, the interlayer b, the interlayer c and the core layer to obtain a plate blank;
and carrying out hot press molding on the plate blank to obtain the mildew-proof, water-proof and earthquake-proof container bottom plate.
The concrete modes of the mildew-proof and water-resistant functional layer, the interlayer a, the anti-seismic buffer functional layer, the interlayer b, the interlayer c and the core layer coated with the adhesive are not specially limited, and the gluing amount required by the technical scheme can be achieved by adopting the modes of dipping, brushing and the like which are well known by the technical personnel in the field.
In the invention, the adhesive used between the interlayer a or the interlayer b and the anti-seismic buffer functional layer is preferably polyisocyanate, and cannot be phenolic resin or modified phenolic resin, because the bonding effect of the phenolic resin and the modified phenolic resin is poor, and even the phenolic resin and the modified phenolic resin cannot be bonded.
When the mildew-proof, water-resistant and earthquake-resistant container bottom plate further comprises impregnated bond paper, the coating mode of the impregnated bond paper is not particularly limited, and the container bottom plate can be formed by adopting a method well known by a person skilled in the art.
In the invention, the hot-press forming temperature is preferably 140-155 ℃, more preferably 145-150 ℃, the hot-press pressure is not less than 4MPa, more preferably 5-8 MPa, and most preferably 6MPa, the hot-press time is preferably 1.5mm/min, the target thickness of the plate is preferably 10-28 mm, more preferably 20-22 mm, and the target density is preferably 0.95-1.10 g/cm3More preferably 1.02 to 1.05g/cm3. In the invention, the hot press molding is preferably carried out by placing the plate blank in a hot press, and carrying out hot press molding in the hot press in a hot-in cold-out mode.
After the hot press forming is completed, the temperature of the upper hot press plate and the lower hot press plate is preferably reduced to be below 60 ℃, and the plates are taken out to obtain the mildew-proof, water-proof and earthquake-proof container bottom plate, more preferably reduced to be 45-50 ℃.
To further illustrate the present invention, the following description will be made in detail with reference to examples to provide a container bottom plate and a method for manufacturing the same, which should not be construed as limiting the scope of the present invention.
Example 1
Fig. 1 is a schematic structural diagram of a bottom plate of a mildew-proof, water-resistant and shock-resistant container manufactured in this embodiment, wherein the bottom plate is a piece of impregnated bond paper, the bottom plate is a mildew-proof and water-resistant functional layer, the interlayer a is an interlayer a, the bottom plate is a shock-resistant buffer functional layer, the interlayer b is an interlayer c, and the interlayer c is a core layer.
The mildew-proof water-resistant anti-seismic container bottom plate comprises a first impregnated bond paper, a second mildew-proof water-resistant functional layer, a third interlayer a, a fourth anti-seismic buffer functional layer, a fifth interlayer b, a sixth interlayer c and a seventh core layer in sequence from a surface layer to the core layer. The dipping glue film paper is tri (2-ethoxyl) isocyanurate modified melamine resin dipping paper; the mould-proof and waterproof functional layer is a fibrous bamboo bundle veneer; the interlayer a is a poplar veneer; the anti-seismic buffer functional layer is a chloropropane rubber sheet; the interlayer b is a poplar veneer; the interlayer c is a bamboo mat; the core layer is a fibrous bamboo bundle veneer.
The embodiment also provides a preparation method of the mildew-proof, water-resistant and earthquake-resistant container soleplate, which comprises the following steps:
s1, preparation of impregnated bond paper:
s11, use 70g/m2And (3) impregnating base paper of the adhesive film paper, controlling the impregnation amount to be 140 wt%, and preparing the tris (2-hydroxyethyl) isocyanurate modified melamine resin impregnated paper with the thickness of 0.30 mm.
S2, preparing a mould-proof water-resistant functional layer:
s21, selecting four-year-old moso bamboos, cutting round bamboos into bamboo tube sections with the length of 2m, forming bamboo strips by bamboo striking and splitting and bamboo joint removal, mechanically scraping off 3mm bamboo green and bamboo yellow by using a steel brush, mechanically rolling by using 6 sets of symmetrical compression rollers to form a fibrous bamboo bundle, transversely weaving and integrating the bamboo bundle by using sewing equipment to form a fibrous bamboo bundle veneer, and drying until the water content is below 8% for later use.
And S22, soaking the fiberized bamboo bundle veneer into the mildew preventive, drying, soaking the adhesive, and drying until the water content is below 8% for later use. By utilizing a pressurized impregnation process, a water-borne organic silicon quaternary ammonium salt mildew preventive is selected, the concentration of the agent is 3.0 percent, the pressurization time is 30min, and the impregnation pressure is 0.05 MPa; the adhesive is modified phenolic resin. By adjusting the process parameters, the medicine loading rate after drying is controlled to be 12 wt.%, and the gum dipping amount of the bamboo bundles is controlled to be 10 wt.%.
S3, preparation of interlayer a:
s31, taking poplar wood segments, rotary cutting to obtain a wood veneer with the thickness of 1.2mm, coating the adhesive which is phenolic resin and the glue coating amount of 125g/m on one side2。
S4, preparing an anti-seismic buffer functional layer:
s41, selecting a chloropropane rubber sheet with the thickness of 2.0mm, coating the adhesive of polyisocyanate, wherein the single surface of the adhesive is 90g/m2。
S5, preparing interlayer b:
s51, taking poplar wood segments, rotary cutting to obtain a wood veneer with the thickness of 1.2mm, coating the adhesive which is phenolic resin and the glue coating amount of 125g/m on one side2。
The adhesive used between the S52 interlayer a (or the fifth interlayer b) and the fourth anti-seismic buffer functional layer is polyisocyanate, but not phenolic resin.
S6, preparation of interlayer c:
s61, selecting four-year-old moso bamboos, cutting the round bamboos into bamboo tube sections with the length of 2.4m, and obtaining radial bamboo strips with the width of 20mm by using a bamboo strip breaking machine.
And S62, weaving the bamboo skin by warps and wefts at 90 degrees to obtain the bamboo mat.
S7, preparing a core layer:
and S71, taking the fiberized bamboo bundle veneer prepared in the S21, soaking the adhesive, and drying until the water content is below 8% for later use. Wherein the adhesive is phenolic resin, and the gluing amount is 15 wt.%.
S8, assembling the plates:
s81, symmetrically assembling the blank according to the combination form of (III), (IV) and (IV).
S82, enabling assembly textures of the bamboo bundle veneers in the mould-proof and water-resistant functional layer to be consistent, and enabling the number of layers to be 3; the assembly texture of the single plate in the interlayer a (and the interlayer b) is vertical to the texture of the mildew-proof water-resistant functional layer, and the number of layers is 2; fourthly, the number of layers of the anti-seismic buffer function is 1; sixthly, the number of the bamboo unit layers in the interlayer c is 3; and the assembly texture of the bamboo beam veneer in the core layer is consistent with the texture of the mould-proof water-resistant functional layer, and the number of layers is 2.
S9, preparing a mildew-proof, water-resistant and earthquake-resistant container bottom plate:
placing the plate blank in a hot press, hot-pressing and forming in the hot press by adopting a hot-in cold-out mode, wherein the hot-pressing temperature is 145 ℃, the hot-pressing pressure is 8MPa, the hot-pressing time is 1.5mm/min, the target thickness of the plate is 28mm, and the target density is 1.05g/cm3. And (5) reducing the temperature of the upper hot pressing plate and the lower hot pressing plate to 50 ℃, and taking out the plates.
Example 2
The mildew-proof, water-resistant and shock-resistant container bottom plate structure of the embodiment is as shown in fig. 1, and comprises (a) impregnated bond paper, (b) a mildew-proof and water-resistant functional layer, (c) an interlayer (a), a shock-resistant buffer functional layer, (b) an interlayer (c) and (c) a core layer in sequence from a surface layer to the core layer. The dipping glue film paper is tri (2-ethoxyl) isocyanurate modified melamine resin dipping paper; the mould-proof and waterproof functional layer is a fibrous bamboo bundle veneer; the interlayer a is a maple veneer; the anti-seismic buffer functional layer is a nitrile rubber sheet; the interlayer b is a poplar veneer; the interlayer c is a bamboo curtain; the core layer is a fibrous bamboo bundle veneer.
The embodiment also provides a preparation method of the mildew-proof, water-resistant and earthquake-resistant container soleplate, which comprises the following steps:
s1, preparation of impregnated bond paper:
s11, use 70g/m2And (3) impregnating base paper of the adhesive film paper, controlling the impregnation amount to be 130 wt%, and preparing the tris (2-hydroxyethyl) isocyanurate modified melamine resin impregnated paper with the thickness of 0.20 mm.
S2, preparing a mould-proof water-resistant functional layer:
s21, selecting four-year-old moso bamboos, cutting round bamboos into bamboo tube sections with the length of 2m, forming bamboo strips by bamboo striking and splitting and bamboo joint removal, mechanically scraping off 3mm bamboo green and bamboo yellow by using a steel brush, mechanically rolling by using 6 sets of symmetrical compression rollers to form a fibrous bamboo bundle, transversely weaving and integrating the bamboo bundle by using sewing equipment to form a fibrous bamboo bundle veneer, and drying until the water content is below 8% for later use.
And S22, soaking the fiberized bamboo bundle veneer into the adhesive, and drying until the water content is below 8% for later use. Wherein the adhesive is modified phenolic resin, and the gluing amount is 29 wt.%.
And S23, the sizing amount is realized by a mode of gum dipping, drying, gum dipping again and drying again.
S3, preparation of interlayer a:
s31, taking maple wood segments, rotary cutting to obtain a wood veneer with a thickness of 1.0mm, coating an adhesive which is modified phenolic resin, and coating the adhesive with a single surface of 120g/m2。
S4, preparing an anti-seismic buffer functional layer:
s41, selecting a nitrile rubber sheet with the thickness of 1.0mm, coating the adhesive by using polyisocyanate, wherein the coating amount is 100g/m per side2。
S5, preparing interlayer b:
s51, taking poplar wood segments, rotary cutting to obtain a wood veneer with the thickness of 1.2mm, coating the adhesive which is modified phenolic resin, and coating the adhesive with the amount of 130g/m on one surface2。
The adhesive used between the S52 interlayer a (or the fifth interlayer b) and the fourth anti-seismic buffer functional layer is polyisocyanate, and is not modified phenolic resin.
S6, preparation of interlayer c:
s61, selecting four-year-old moso bamboos, cutting the round bamboos into bamboo tube sections with the length of 2.4m, and obtaining radial bamboo strips with the width of 25mm by using a bamboo strip breaking machine.
And S62, transversely weaving the thin bamboo strips to obtain the bamboo curtain.
S7, preparing a core layer:
and S71, taking the fiberized bamboo bundle veneer prepared in the S21, soaking the adhesive, and drying until the water content is below 8% for later use. Wherein the adhesive is phenolic resin, and the gluing amount is 12 wt.%.
S8, assembling the plates:
s81, symmetrically assembling the blank according to the combination form of (III), (IV) and (IV).
S82, enabling assembly textures of the bamboo bundle veneers in the mould-proof and water-resistant functional layer to be consistent, and enabling the number of layers to be 2; the assembly texture of the single plate in the interlayer a (and the interlayer b) is vertical to the texture of the mildew-proof water-resistant functional layer, and the number of layers is 1; fourthly, the number of layers of the anti-seismic buffer function is 1; sixthly, the number of the bamboo unit layers in the interlayer c is 4, and the bamboo unit layers are assembled into a 90-degree assembly form; and the assembly texture of the bamboo beam veneer in the core layer is consistent with the texture of the mould-proof water-resistant functional layer, and the number of layers is 2.
S9, preparing a mildew-proof, water-resistant and earthquake-resistant container bottom plate:
placing the plate blank in a hot press, hot-pressing and forming in the hot press by adopting a hot-in cold-out mode, wherein the hot-pressing temperature is 150 ℃, the hot-pressing pressure is 5MPa, the hot-pressing time is 1.5mm/min, the target thickness of the plate is 20mm, and the target density is 1.02g/cm3. And (5) reducing the temperature of the upper hot pressing plate and the lower hot pressing plate to 50 ℃, and taking out the plates.
Example 3
The mildew-proof water-resistant anti-seismic container bottom plate comprises a first impregnated bond paper, a second mildew-proof water-resistant functional layer, a third interlayer a, a fourth anti-seismic buffer functional layer, a fifth interlayer b, a sixth interlayer c and a seventh core layer in sequence from a surface layer to the core layer. The dipped adhesive film paper is melamine resin dipped paper; the mould-proof and waterproof functional layer is a fibrous bamboo bundle veneer; the interlayer a is a sliced bamboo veneer; the anti-seismic buffer functional layer is a cork rubber sheet; the interlayer b is a rotary-cut bamboo veneer; the interlayer c is a bamboo skin net sheet; the core layer is a fibrous bamboo bundle veneer.
The embodiment also provides a method for preparing the mildew-proof, water-resistant and earthquake-resistant container soleplate, which comprises the following steps:
s1, preparation of impregnated bond paper:
s11, use 70g/m2And (3) impregnating the base paper of the adhesive film paper, controlling the gum dipping amount to be 150 wt%, and preparing the melamine resin impregnated paper with the thickness of 0.30 mm.
S2, preparing a mould-proof water-resistant functional layer:
s21, selecting three-year-old moso bamboos, cutting round bamboos into bamboo tube sections with the length of 2m, forming bamboo strips by bamboo collision separation and bamboo joint removal, mechanically scraping off 2mm bamboo green and bamboo yellow by using a steel brush, mechanically rolling by using 6 sets of symmetrical compression rollers to form a fibrous bamboo bundle, transversely weaving and integrating the bamboo bundle by using sewing equipment to form a fibrous bamboo bundle veneer, and drying to the moisture content of below 8% for later use.
And S22, soaking the fiberized bamboo bundle veneer into the mildew preventive, drying, soaking the adhesive, and drying until the water content is below 8% for later use. By utilizing a pressurized impregnation process, selecting a silicon-aluminum sol to fix a copper-boron compound mildew preventive, wherein the concentration of the agent is 3.0 percent, the pressurization time is 30min, and the impregnation pressure is 0.05 MPa; the adhesive is phenolic resin. By adjusting the process parameters, the medicine loading rate after drying is controlled to be 12 wt.%, and the gum dipping amount of the bamboo bundles is controlled to be 10 wt.%.
S3, preparation of interlayer a:
s31, slicing a bamboo flat pressing plate to obtain a bamboo veneer with a thickness of 2mm, coating an adhesive of phenolic resin and a single surface of 130g/m2。
S4, preparing an anti-seismic buffer functional layer:
s41, selecting a cork rubber sheet with the thickness of 2.0mm, coating the adhesive by polyisocyanate, wherein the single surface of the adhesive is 90g/m2。
S5, preparing interlayer b:
s51, rotary cutting round bamboo to obtain bamboo veneer with thickness of 0.5mm, coating adhesive of phenolic resin with single surface of 140g/m2。
The adhesive used between the S53 interlayer a (or the fifth interlayer b) and the fourth anti-seismic buffer functional layer is polyisocyanate, but not phenolic resin.
S6, preparation of interlayer c:
and S61, selecting three-year-old moso bamboos, cutting the round bamboos into bamboo tube sections with the length of 2.4m, and obtaining radial bamboo strips with the width of 20mm by using a bamboo strip breaking machine.
And S62, weaving the thin bamboo strips at an angle of 60 degrees/120 degrees to obtain the thin bamboo strip net-shaped sheet.
S7, preparing a core layer:
and S71, taking the fiberized bamboo bundle veneer prepared in the S21, soaking the adhesive, and drying until the water content is below 8% for later use. Wherein the adhesive is phenolic resin, and the gluing amount is 12 wt.%.
S8, assembling the plates:
s81, symmetrically assembling the blank according to the combination form of (III), (IV) and (IV).
S82, enabling assembly textures of the bamboo bundle veneers in the mould-proof and water-resistant functional layer to be consistent, and enabling the number of layers to be 2; the assembly texture of the single plate in the interlayer a (and the interlayer b) is vertical to the texture of the mildew-proof water-resistant functional layer, and the number of layers is 1; fourthly, the number of layers of the anti-seismic buffer function is 1; sixthly, the number of the bamboo unit layers in the interlayer c is 4, and the bamboo unit layers are assembled at an angle of 60 degrees/120 degrees; and the assembly texture of the bamboo beam veneer in the core layer is consistent with the texture of the mould-proof water-resistant functional layer, and the number of layers is 2.
S9, preparing a mildew-proof, water-resistant and earthquake-resistant container bottom plate:
placing the plate blank in a hot press, hot-pressing and forming in the hot press by adopting a hot-in cold-out mode, wherein the hot-pressing temperature is 145 ℃, the hot-pressing pressure is 6MPa, the hot-pressing time is 1.5mm/min, the target thickness of the plate is 22mm, and the target density is 1.05g/cm3. And (5) reducing the temperature of the upper hot pressing plate and the lower hot pressing plate to 45 ℃, and taking out the plates.
The performances of the bottom boards of the mildew-proof, water-resistant and earthquake-proof containers of examples 1 to 3 are detected according to the requirements of standards such as GB/T19536-.
Table 1 examples 1-3 properties of the bottom plate of the mildew-proof, water-resistant and earthquake-resistant container
Test items Standard value Value in test Standard Example 1 Example 2 Example 3
Water content% ≤12.0 5.0～8.0 ≤7.1 ≤6.8 ≤6.5
Density/g.cm-3 ≥0.75 0.95～1.10 1.05 1.02 1.05
Static bending strength (longitudinal)/MPa ≥75.0 80～90 ≥95 ≥95 ≥95
Modulus of elasticity (longitudinal)/GPa ≥8.0 8.5～9.0 ≥10 ≥10 ≥10
Concentrated load (middle)/kN ≥48.0 50.0～60.0 ≥70.0 ≥55.0 ≥54.0
Water absorption thickness swelling ratio/%) ≤18.0 6.0～9.0 ≤5.0 ≤5.0 ≤5.0
Mildew resistance rating - 1 0 0 0
Dynamic load/fatigue strength/ten thousand times - 10 ≥15 ≥15 ≥15
As can be seen from the data in Table 1, the container bottom plate provided by the invention has various performances meeting the standard requirements and superior to the parameter values reported by the test standards. The data of the mildew-proof grade can showThe container bottom plate provided by the invention has excellent mildew resistance; according to the data of the water absorption thickness expansion rate, the container bottom plate provided by the invention has good water resistance and deformation resistance; the elastic modulus (longitudinal direction) and the dynamic load/fatigue strength (surface bearing 1600N/m)2Force, frequency 1Hz), the container floor provided by the invention has excellent elasticity, can well resist external force, and simultaneously bears reciprocating load. In conclusion, the preparation method of the container bottom plate provided by the invention can widen the application field and prolong the service life of the container bottom plate.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be construed as the protection scope of the present invention.

Claims (10)

1. The mildew-proof water-resistant anti-seismic container bottom plate is characterized by sequentially comprising a mildew-proof water-resistant functional layer, an interlayer a, an anti-seismic buffer functional layer, an interlayer b, an interlayer c and a core layer which are symmetrically arranged from a surface layer to the core layer, wherein the mildew-proof water-resistant functional layer is a fiberized bamboo bundle veneer, the anti-seismic buffer functional layer is a rubber sheet, the interlayer a and the interlayer b are veneers, the interlayer c is a bamboo unit layer, and the core layer is a fiberized bamboo bundle veneer.
2. The mildew-proof, water-resistant and earthquake-resistant container bottom plate according to claim 1, wherein the outermost layer of the mildew-proof, water-resistant and earthquake-resistant container bottom plate further comprises symmetrically arranged impregnated bond paper, and the impregnated bond paper is melamine resin impregnated paper or melamine resin impregnated paper toughened and modified by polyethylene glycol.
3. The bottom plate of a mildew-proof, water-resistant and earthquake-resistant container as claimed in claim 1, wherein the veneers comprise wood veneers or bamboo veneers, and the wood veneers comprise poplar, maple, pine or eucalyptus.
4. The bottom plate of the container of claim 1, wherein the rubber sheet is made of chloropropane rubber, nitrile rubber or cork rubber.
5. The bottom plate of a mildew-proof, water-resistant and earthquake-resistant container as claimed in claim 1, wherein the bamboo unit layer is a bamboo mat, a bamboo curtain or a bamboo split net-shaped sheet.
6. The bottom plate of a mildew-proof, water-resistant and earthquake-resistant container as claimed in claim 5, wherein the bamboo mat is a bamboo skin unit with a weaving angle of 90 °.
7. The bottom plate of a mildew-proof, water-resistant and earthquake-resistant container as claimed in claim 5, wherein the bamboo skin net-shaped sheet is a bamboo skin unit with a weaving angle of 90 ° or 60 °/120 °.
8. The bottom plate of a mildew-proof, water-resistant and earthquake-resistant container as claimed in claim 1, wherein the amount of sizing of the mildew-proof, water-resistant functional layer is 15 wt.% to 30 wt.%.
9. The bottom plate of the mildew-proof, water-resistant and earthquake-resistant container according to claim 1, wherein the mildew-proof and water-resistant functional layer further contains a mildew preventive, the mildew preventive is a water-borne organic silicon quaternary ammonium salt mildew preventive or a silicon-aluminum sol fixed copper-boron compound mildew preventive, the drug loading of the mildew-proof and water-resistant functional layer is 10 wt.% to 12 wt.%, and the gluing amount of the mildew-proof and water-resistant functional layer is 10 wt.% to 15 wt.%.
10. The preparation method of the mildew-proof, water-resistant and earthquake-proof container bottom plate as claimed in any one of claims 1 to 9, which is characterized by comprising the following steps:
after the mildew-proof and water-resistant functional layer, the interlayer a, the anti-seismic buffer functional layer, the interlayer b, the interlayer c and the core layer are coated with an adhesive, symmetrically assembling according to the combination form of the mildew-proof and water-resistant functional layer, the interlayer a, the anti-seismic buffer functional layer, the interlayer b, the interlayer c and the core layer to obtain a plate blank;
and carrying out hot press molding on the plate blank to obtain the mildew-proof, water-proof and earthquake-proof container bottom plate.
CN202010659830.0A 2020-07-10 2020-07-10 Mildew-proof water-resistant anti-seismic container bottom plate and preparation method thereof Pending CN113927966A (en)

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Application Number Priority Date Filing Date Title
CN202010659830.0A CN113927966A (en) 2020-07-10 2020-07-10 Mildew-proof water-resistant anti-seismic container bottom plate and preparation method thereof

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Publication Number Publication Date
CN113927966A true CN113927966A (en) 2022-01-14

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